Catalytic cracking spray nozzle with internal liquid particle dispersion ring

Patent metadata

Field	Value
Publication number	US-2016288075-A1
Application number	US-201415036238-A
Country	US
Kind code	A1
Filing date	Oct 3, 2014
Priority date	Nov 12, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A gas assisted spray nozzle assembly having a nozzle body in the form of a hollow tubular member, such as a single cylindrical pipe section, which defines a mixing zone and a downstream barrel extension zone. A liquid inlet and an impingement pin are supported by said tubular member in opposed relation to each other at the mixing zone, and a pressurized gas inlet is provided at an upstream end of the tubular member. An annular dispersion ring is fixedly supported within said tubular member downstream of said impingement pin for defining an annular ledge for directing a peripheral portion of pressurized gas stream and liquid atomized in the mixing zone radially inwardly for facilitating continued intermixing of the liquid and pressurized gas stream as they proceed through the barrel zone for discharge from the spray nozzle.

First claim

1 . A gas assisted liquid spray nozzle assembly comprising:
a nozzle body in the form of a hollow cylindrical tubular member which defines a cylindrical mixing zone and a cylindrical barrel extension zone downstream of the mixing zone longer in axial length than the mixing zone; a liquid inlet supported by said tubular member through which a pressurized liquid stream is directed into said mixing zone; an impingement pin supported by said tubular member and extending into said mixing zone having an impingement surface in substantial alignment with the liquid inlet against which a liquid stream directed into said mixing zone from said liquid inlet impinges and is transversely directed; a gas inlet mounted in an upstream end of said tubular member through which a pressurized gas stream is directed into said mixing chamber along a central axis of said mixing zone for atomizing the liquid impinging upon said impingement surface and directing atomized liquid through said barrel zone; a spray tip mounted at a downstream end of said tubular member having a discharge orifice through which said atomized liquid from said barrel zone is discharged in a predetermined spray pattern; and an annular dispersion ring fixedly supported within said tubular member downstream of said impingement pin, said dispersion ring defining an annular ledge for directing a peripheral portion of the pressurized gas stream and atomized liquid radially inwardly for facilitating continued intermixing of the liquid and pressurized gas stream as they proceed through the barrel zone for discharge from the spray tip.

2 . The gas assisted spray nozzle assembly of claim 1 in which said dispersion ring is a cylindrical ring.

3 . The gas assisted spray nozzle assembly of claim 2 in which said cylindrical ring is a separate part fixed within said tubular member.

4 . The gas assisted spray nozzle assembly of claim 1 in which said dispersion ring is located between said mixing zone and said barrel extension zone.

5 . The gas assisted spray nozzle assembly of claim 1 in which said impingement pin is disposed about midway between the gas inlet and said dispersion ring.

6 . The gas assisted spray nozzle assembly of claim 1 in which said annular ring has a radial depth of less than ⅛ the internal diameter of the mixing chamber.

7 . The gas assisted spray nozzle assembly of claim 6 in which said annular ring has a radial depth of about 1/10 the internal diameter of the tubular member

8 . The gas assisted spray nozzle assembly of claim 4 in which said extension barrel zone has an axial length between 2 and 10 times the axial length of the mixing zone.

9 . The gas assisted spray nozzle assembly of claim 1 in which said hollow tubular member is a one piece section of steel pipe.

10 . The gas assisted spray nozzle assembly of claim 9 in which said tubular member is formed with a first opening adjacent an upstream end thereof that receives said liquid inlet and a second opening in opposed relation to the said first opening for receiving said impingement pin.

11 . The gas assisted spray nozzle of claim 1 in which said gas inlet is coupled to a supply of pressurized steam.

Assignees

• Spraying Systems Co
• Technip Process Tech Inc

Inventors

• Lacroix Mark
• Gbordzoe Eusebius Anku
• Santner Chris Robert

Classifications

• B05B1/044 Primary

  Slits, e.g. narrow openings defined by two straight and parallel lips; Elongated outlets for producing very wide discharges, e.g. fluid curtains (B05B1/046 takes precedence) · CPC title

• B05B7/0483

  with gas and liquid jets intersecting in the mixing chamber · CPC title

• B05B1/046

  Outlets formed, e.g. cut, in the circumference of tubular or spherical elements · CPC title

• B01J8/24 Primary

  according to "fluidised-bed" technique (B01J8/20 takes precedence) · CPC title

• B01J2208/00902

  Nozzle-type feeding elements · CPC title